Ball, Sir R.S. Atoms and sunbeams.--Ball, Sir R.S. Wanderings of the North pole.--Thomson, Sir W. Age of the sun's heat.--Proctor, R.A. Past and future of our earth.--Proctor, R.A. New theory of life in other worlds.--Woodward, R.S. Mathematical theories of the earth.--Schiaparelli, G.V. Rotation and physical constitution of the planet Mercury.--Schiaparelli, G.V. Planet Mars.--Darwin, G.H. Meteorites and stellar systems.--Harkness, W. Magnitude of the solar system.--Mitchel, O.M. Stability of the solar system.--Ledger, E. The new planet, Eros.--Holden, E.S. Sidereal astronomy: old and new.--Holden, E.S. Photography the servant of astronomy.--Holden, E.S. Beginnings of American astronomy.--Herschel, Sir J.F.W. Stellar parallax.--Hastings, C.S. History of the telescope.--Huggins, W. Results of spectrum analysis applied to heavenly bodies.--Huggins, W. Celestial spectroscopy.--Huggins, W. New astronomy.--Gill, D. An astronomer's work in a modern observatory.--Laplace, P.S. System of the world--The nebular hypothesis.--Searle, G.M. Are the planets habitable?
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